(19)

(11)

EP 2 427 794 A1

(12)

(43) Date of publication: 14.03.2012 Bulletin 2012/11 (21) Application number: 10772334.8 (22) Date of filing: 22.04.2010

(51) International Patent Classification (IPC):  G02B 23/08(2006.01) G02B 27/01(2006.01) G02B 23/10(2006.01) (86) International application number: PCT/SE2010/050444 (87) International publication number: WO 2010/128932 (11.11.2010 Gazette 2010/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 07.05.2009 SE 0950319 (71) Applicant: BAE Systems Hägglunds Aktiebolag 891 82 Örnsköldsvik (SE)	(72) Inventors: MANNELQVIST, Anders S-892 50 Domsjö (SE) NORDIN, Daniel S-891 51 Örnsköldsvik (SE) GUSTAFSSON, Torbjörn S-583 32 Linköping (SE) CARLEBERG, Per S-118 48 Stockholm (SE) (74) Representative: Norberg, Charlotte  ALBIHNS.ZACCO AB P.O. Box 5581 114 85 Stockholm 114 85 Stockholm (SE)